STM Powersports Tuner Secondary | 2021-2025 RZR XP-Turbo -"S" and 2021-25 Pro-XP, Turbo R

*We will Contact you for what mods if any you have to choose what spring and Helix you need or you can make a note in notes section of your cart the application you will be using this in so we can communicate with STM on what you will be needing.* Tuner Secondary clutch for RZR XP Turbo, Turbo-S, and Pro XP All billet design, uses the STM Gen 1 ATV style helixes Can be used with the stock primary or the billet Rage primary Uses OEM or OEM replacement belts Includes hub insert and new retaining bolt. Includes an adjuster nut tool to change the belt and set the belt deflection Available with a compression or torsion style spring cover. Spring Options: KSS3 Black Spring 2 1/2" load 115 lbs - 1 1/4" load 220 lbs KSS9 Dark Green Spring 2 1/2" load 165 lbs - 1 1/4" load 280 lbs KSS8 Lime Green Spring 2 1/2" load 198 lbs - 1 1/4" load 322 lbs KSS12 Blue Spring 2 1/2" load 233 lbs - 1 1/4" load 337 lbs 210270-003 Orange/Purple Secondary 2 1/2" load 199 lbs - 1 1/4" load 370 lbs Spring Helix Angle Options: 33 Degree ATV Tuner Helix 35 Degree ATV Tuner Helix 35/40°P Gen 1 ATV Tuner Helix (Most Popular) 35/45ºP Gen1 ATV Helix 35/55ºP Gen1 ATV Helix 35/65ºP Gen1 ATV Helix 36º Reverse Rotation Helix 37/42ºP Gen1 ATV Helix 37/53 Degree ATV Tuner Helix 38/45º Gen1 ATV Helix 40 Degree ATV Tuner Helix 40/32ºP Gen1 ATV Helix 40/36 Degree ATV Tuner Helix 40/45º Gen1 ATV Helix 40/45º Reverse Rotation Helix 40/50ºP Gen1 ATV Helix 40/55ºP Gen1 ATV Helix 40/58 Degree ATV Tuner Helix 42 Degree ATV Tuner Helix 42/36° Gen 1 ATV Tuner Helix 42/40ºP Gen1 ATV Helix 44/32ºP Gen1 ATV Helix 44/36ºP Gen1 ATV Helix 44/38º Gen1 ATV Helix 45 Degree ATV Tuner Helix 45/35 Degree ATV Tuner Helix 45/40 Degree ATV Tuner Helix 45º Reverse Rotation Helix 47º Degree ATV Tuner Helix Gen1 48/36 Degree ATV Tuner Helix 50 Degree ATV Tuner Helix 50/34º ATV Tuner Helix 50/40 Degree ATV Tuner Helix 50/40ºA ATV Gen 1 Tuner Helix 50/40º Reverse Rotation Helix 50/45 Degree ATV Tuner Helix 53/37º ATV Tuner Helix 55/45 Degree ATV Tuner Helix 58/48 Degree ATV Tuner Helix 60 Degree ATV Tuner Helix 60/50 Degree ATV Tuner Helix This is a FINNED style secondary that allows for more air movement inside the clutch housing, it helps keep the clutches, housing and belts cooler. You will need to cut the cross section part of the clutch housing duct to clear the adjustment nut on the secondary clutch to run this secondary. This is an all billet construction that is capable of using compression springs. We have different spring rate options available (see menu above). We have many helix angles available (see menu for options). We can also provide custom helix angles if you desire for an additional fee. Comes with bolt for installation. Can be used along with the stock primary or the STM primary. Best results are acquired when running both the STM primary and STM tuner together. Choose a helix angle - The most popular helix is the 35/40ºP. It is a good all-around helix. We found that is worked the best for the average to aggressive trail rider. Choose a spring– The most popular spring is the KSS8 lime green. This spring works well for most average to aggressive trail/dune riders. KEEP IN MIND WE CAN ONLY GET YOU CLOSE WITH SET-UP. Everyone's riding style is different so it’s up to you - the customer to do the fine tuning!